180k views
4 votes
What is x?:

1. 8x - 28 - 2x=-10
2. 12 + 2x + 1=59
3. 4 + .25x + 3= 10
4. -2 +25x +17=-35
5. 8.6x + 4.4x - 11= 54
6. 3.3x - 26.4 -x =1.2
7. 7x - 10x + 18 +2x = -5
8. 7x+15 - 9x =5
9. 15= .5+ 3/2x +10
10. -17x - 8+ x =24

User Swchen
by
4.0k points

1 Answer

2 votes

Answer:

1) 3

2)23

3) 12

4) -2

5) 5

6) 12

7) 23

8) 5

9)3

10)-2

Explanation:

1) 8x-28-2x=-10

+28 +28

6x=18

*divide both sides by 6*

x=3

2) 12+2x+1=59

13+2x=59

-13 -13

2x=46

*divide both sides by 2*

x=23

3) 4 + .25x + 3= 10

7+.25x=10

-7 -7

.25x=3

*divide both sides by .25*

x=12

4)-2 +25x +17=-35

15+25x=-35

-15 -15

25x=-50

*divide both sides by 25*

x=-2

5) 8.6x + 4.4x - 11= 54

13x-11=54

+11 +11

13x=65

*divide both sides by 13*

x=5

6) 3.3x - 26.4 -x =1.2

2.3x-26.4=1.2

+26.4 +26.4

2.3x=27.6

*divide both sides by 2.3*

x=12

7) 7x - 10x + 18 +2x = -5

9x-10x+18=-5

-x+18=-5

-18 -18

-x=-23 or x=23

8) 7x+15 - 9x =5

-2x+15=5

-15 -15

-2x=-10

*divide both sides by -2*

x=5

9) 15= .5+ 3/2x +10

15=10.5+2/3x

(2/3)4.5=3/2x(2/3)

3=x or x=3

10) -17x - 8+ x =24

-16x-8=24

+8 +8

-16x=32

*divide both sides by -16*

x=-2

Hope that helped :)

User Wee Zel
by
3.4k points